Thanks Mike, I understand what you mean.
I have an old harbor freight greenhouse frame, not too many panels left and I can't stand the thought of replacing all those missing panels. We put the original ones in with lots of silicone and clips, and I was trying to figure out how I could just use clear plastic.
Thank you very much for telling me about using the wood! I could not for the life of me figure out how to do it. Now I just have to figure out where to get the plastic and what size and thickness- what do you use?
